public abstract  class ab {

    public static void main(String[] args) {
       /* String s  = new String("a")+new String("b");

        String s2 =s.intern();
        System.out.println(s2 =="ab");
        System.out.println(s =="ab");*/
        int a = 0;
        int b = 0;
        do  {
            --b;
            a = a - 1;

        }while (a>0);
        System.out.println(b);
    }

}
